Blower



UNITED STATES PATENT OFFICE.

T. H. I/VILLSON, OF I-IARRISBURG, PENNSYLVANIA.

BLOWER.

Specification of Letters Patent No. 31,844, d'ated March 26, 1861.

To all whom it may concern:

Be it known that I, T. H. IVILLsoN, of Harrisburg, in the county ofDauphin and State of Pennsylvania, have invented certain new and usefulImprovements in Blowers; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe accompanying drawings and to the letters of reference markedthereon.

The nature of my invention consists in constructing` and arranging theseveral parts of this blower in the manner herein after described.

In the annexed drawings Figure l represents a side view with one side ofthe case removed. Fig. 2 is a top view of the blower wheel. Fig. 3,is aview of a portion of the blower case. Fig. 4, is a perspective of one ofthe wings or arms of the blower wheel.

In the figures A, represents the blower case which is cast in two partsand in the form represented in the drawingl said case being very similarin shape to the snail shell. Each portion of the case is cast with anopening Z, near its center and with a flange around its periphery by orthrough which the two portions are secured together. Packing may beinserted between the two sections of the case, by means of which thecapacity of the case may be increased or diminished to some degree.

D, D, represent a series of arms or wings which when placed and securedtogether in proper manner around the shaft B, constitute the blowerwheel. The wings or arms D, D, are cast in the peculiar' shaperepresented in the Figs. l, 2, 4, Fig. 4, representw ing more fully andclearly the shape of the said wings. The wings are cast with heels, asshown in Fig. 4, which form a hub, when several of said wings are fittedtogetherand this hub is held together by means of l two metallic bandswhich are shrunk upon or over the projecting sides of the heels. e,represents a comb or ange cast upon one side- (the back) of the wingwhich serves togive strength to said wing, and which fitting against thewing next to it in the wheel, goes to form with the heels of the wingsas constructed a wheel with a self supporting center. The front portionof the wing is cast in a curved form and hollowing, havingv sides a, a,which converge from near the heel where they begin, to the point of thewing. These wings receive the air from the openingsZ, and force it inthe direction of the arrow around the grooves in the case seen from a",to When air is forced it escapes through the most accessible channel,and being prevented from escaping from the wings by the sides a, a, itpasses out freely through the grooves to the mouth of the case.

The shaft B, has its bearings in journal boxes formed in supports castupon each side of the ease.

CZ, CZ, represent the bands which are shrunh around the heels of thewings, or the hub formed `by said heels.

Having thus fully described my invention what I claim as new and desireto secure by Letters Patent isl. The employment of the blower wheel asconstructed, composed of a series of wings or arms (D) cast in the formrepresented and being secured together' by means of the devices beforedescribed, all as and for the purpose set forth.

2. In combination with the subject of the first claim I claim the fancase constructed in the shape and manner herein represented.

TI-IOS. H. WILLSON.

Witnesses:

C. M. ALEXANDER,v A. A. YEATMAN.

